TikTok CEO Shou Chew has testified before Congress.leolintang/Getty, Tyler Le/BIThe Supreme Court ruled against TikTok on its challenge against a divest-or-ban law.TikTok's owner, ByteDance, has until January 19 to divest from its US app or face a shutdown.President-elect Donald Trump may still try to rescue TikTok once in office.The Supreme Court decided not to rescue TikTok from a divest-or-ban law.The justices said on Friday in a unanimous decision that the law did not violate the First Amendment rights of TikTok and its creators.